Revert "staging: octeon: delete driver"

This reverts commit 710d7fbe21ee2ceab121f1f84a20edf68f9f9742.
Re-instate the code so subsequent commits can clean it up and get it
building properly.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20200205001116.14096-3-chris.packham@alliedtelesis.co.nz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/staging/octeon/ethernet-util.h b/drivers/staging/octeon/ethernet-util.h
new file mode 100644
index 000000000000..2af83a12ca78
--- /dev/null
+++ b/drivers/staging/octeon/ethernet-util.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This file is based on code from OCTEON SDK by Cavium Networks.
+ *
+ * Copyright (c) 2003-2007 Cavium Networks
+ */
+
+/**
+ * cvm_oct_get_buffer_ptr - convert packet data address to pointer
+ * @packet_ptr: Packet data hardware address
+ *
+ * Returns Packet buffer pointer
+ */
+static inline void *cvm_oct_get_buffer_ptr(union cvmx_buf_ptr packet_ptr)
+{
+	return cvmx_phys_to_ptr(((packet_ptr.s.addr >> 7) - packet_ptr.s.back)
+				<< 7);
+}
+
+/**
+ * INTERFACE - convert IPD port to logical interface
+ * @ipd_port: Port to check
+ *
+ * Returns Logical interface
+ */
+static inline int INTERFACE(int ipd_port)
+{
+	int interface;
+
+	if (ipd_port == CVMX_PIP_NUM_INPUT_PORTS)
+		return 10;
+	interface = cvmx_helper_get_interface_num(ipd_port);
+	if (interface >= 0)
+		return interface;
+	panic("Illegal ipd_port %d passed to %s\n", ipd_port, __func__);
+}
+
+/**
+ * INDEX - convert IPD/PKO port number to the port's interface index
+ * @ipd_port: Port to check
+ *
+ * Returns Index into interface port list
+ */
+static inline int INDEX(int ipd_port)
+{
+	return cvmx_helper_get_interface_index_num(ipd_port);
+}